Will be visiting Japan in the first week of July, and I'm planning on visiting Sapporo - flying there directly. It was a choice between Sydney or Sapporo, two destinations with mild climate in Summer.

Anyway, I have a couple of questions:

1) What sights and/ or tours would you recommend to a first-timer in Northern Japan? I have only been to Tokyo, Kyoto, and Osaka.

2) How many days would you recommend? I am so far thinking of a total of 5 days and four nights. Arrival day, three full days, then departure day.

I am mainly interested in: city tour, nature sights (gardens?), any theme parks worth visiting, and most importantly, food - I heard that the seafood is good, and also there is this Hokkaido curry?

Thanks for any info!